Forstner style drill bits, available in three sizes, for drilling your own mushroom spawn jar lids. All of our Forstner drill bits are suitable for drilling through both metal and plastic mason jar lids. Perfect for the "Do It Yourself" enthusiast wanting to manufacture their own spawn jar myco lids! We recommend using these bits with a drill press for the most accurate results.
Available in three sizes, each with different recommended applications:
Drill bits are also available for mushroom liquid culture jar lids.